Motor mechanism



Patented Aug. 2, 1921.

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-Wrneg Iltl ' larly "plane by two, or a larger number of, coupled engines. I I

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a Application. filed Kay e1;

To all whom it may concern:

Be it known that I, MARC Bmme'r, c t1- zen of the Republic of Switzerland, resid ng at Bois-Colombes, Department of Seine, France, have invented certain new and useful improvements in Motor Mechanism, of whichthe following is a specification.

The invention relates to. means for driving a single part by motor mechanism of a plurality of coupled engines, and more particufor driving the propeller of an aero- The. invention comprises means in which the part to be driven 1s mounted on a counter shaft receiving its rotation from the main shaft through a plurality of pinions on the respective crank shafts of the several engines which are arranged one behind the other, and have their casings connected to one another to constitute in'eifect a unitary structure. V v

Apart from this main arrangement, the invention comprises other arrangements more explicitly referred to hereinafter.

The single figure of the'drawing shows by way of example, in axial longitudinal section, a group of two internal combustion engines coupled together according to the invention.

The two engines, preferably V-engines are arranged one behind the other or in tandem relation so that their bearings for the counter shaft a coincide. At the front end of the counter shaft which is adjacent to the first engine is mounted the propeller, an'd this counter shaft, whether it is composed of one piece, as shown, or a plurality of coupled sections, is connected by any suitable means to the second engine.

Preferably the engines used are those forming the subject matter of the U. S. patent application Serial No. 172,098 filed on e the same day and in the same name for combined gun and engine for aerial machines,

comprising a ball bearing (i in which rotates the counter shaft a, two cylindrical bearin 's e e the axes 'of which coincide with the extended axis of the counter shaft a and which can be used for mounting the barrel of a gun .on the said engine by making this shaft hollow. i v

The back of the casing of the first engine is' provided outside with aball bearing f, having the same axis as the counter shaft a and with a ball bearing 9 having the same I Specification of Letters Patent.

Patented Aug. 2,1921. 1917. sei-ial'lto. 172,099. v

axis as the crank shaft 6 of the front engine; the backof the casing of the en 'ne ahead incloses the joined structures of t e two engines shown, and a cover it is secured to the front of the casing of the foremost engine which cover carries also the bearing for the counter shaft a, and it is thus adapted to fit upon the front of the casing of the next engine to. the rear in placeof such a cover.

The back of thecasing of the first engine is then fixed to the front end of the casing of the next engine to its rear, in. place of a front cover such as that applied to the front engine. In this way the counter shaft a will be formed in one piece, practically held parallel with the crank shafts of the engines, and may be as shown, or it may be composed of sections coupled" together rigidly, since the two-engines form a unita structure; the counter shaft rotatin both in the ball bearings d and f and in thefiiearings c and 6 shaft of the first engine, so as to distribute most effectively the eifectsof the impulses imparted to their crank shafts.

he magnetos i for the two engine's may be fitted on a housing let the back of the rearmost engine, and driven from suitable gears 2" on thesupplemental shaft .6

Obviously the. invention is not limited to the constructions described but any equivalent thereof the claims.

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be per formed, I declare that what I claim is 1. The combination of a plurality of engines arranged in tandem relation and havmg crank casings rigidly connected, therear end ofthe casing of the first en 0 constituting a forward bearing of t e crank shaft of the second engine, a counter shaft common to the said engines and adapted to be directly connected to a drivenelement, and means connecting the drivin shafts of the engine individually to sai common counter shaft for transmitting at all times the full power generated by the combined engines to the counter shaft.

2. The combination of a gines arranged in tandem mg1 crankcasings r1 en of the casing 0 re ation and hav- ;th e first engine consticomprises lurality of em I dly connected, therear.

-tuting a forward bearing for the crank shaft of the second engine, a counter shaft comengine individually to said common counter shaft for transmitting at all times the full power generated by the combined engines to said counter shaft.

3. The combination of a plurality'of engines arranged in tandem and having unconnected crank shafts and rigidly connected casings, the rear end of the casing of the first en 'ne constituting the forward end of the casing of the succeeding engine to provide a, partition between the enginesv which is common to both casings, a countershaft common to said engines and adapted y to the said counter-shaft, ignition magnetos to be connected to a driven element, the counter-shaft being common to the sa1d crank shafts and mounted in the casings of the engines and in parallelism with the crank shafts, means connecting the crank shafts of the respective engines to the said countershaft and at all times transmitting the full power generation of the combined engines for the respective engines mounted in rear of the rearmost engine, and means for driving said magnetos from the rear end of the crankshaft of the'rearmost engine. c

4. The combination of a plurality of engines arranged in tandem relation and havthe counter shaft being common to the said crank shafts and mounted in the casings of the engines in parallelism with the crank shafts, and means connecting the crank shafts of the respective engines to the said counter shaft for transmitting at all times the full power generated b the combined engines to said counter sha t.

5. The combination of a plurality of engines arranged in tandem relation having crank casings rigidly connected and separate .crank shafts, a hollow counter shaft common to the said engines and adapted to be connected to a driven element and means connectin the crank shafts of the engines individua 1y to said common counter shaft to transmit to said counter shaft at all times ,the full power generated by the combined en ines.

, n testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

, r MARC BIRKIGT. Witnesses: CnAs, P. Pnns'sLY,

PAUL PLUM. 

